Plant tissues are categorized broadly into three tissue systems: the epidermis, the ground tissue, and the vascular tissue. Epidermis - Cells forming the outer surface of the leaves and of the young plant body. Vascular tissue - The primary components of vascular tissue are the xylem and phloem.
Answer:
i) iv) ii) iii)
Explanation:
The excitable cell begins being in a resting state, with a negative charge, -70 mV. First (i) there is a stimulus of influx of sodio into the cell, if the stimulus is strong enough and exceeds -55 mV, the threshold potential, then an action potential will occur. (iv) A strong influx of sodium that deporalizes the cells causes a change to a positive charge in the cell. (ii) Then potassium efflux from the cell in large quantities, which repolarizes the cell. (iii) With a continuous efflux of potassium the cell can become more negative than the resting potential, this is called hyperpolarization.
Answer:
b.) centrosome
Explanation:
Centrosome is a structure with the function of main microtubule organizing center (MTOC) of the animal cell. This structure has a key role in mitosis where it acts as a regulator of cell-cycle progression. Centrosome is composed of two centrioles which serve to organize microtubules durind the cell division.
Answer:
The mitochondria is the powerhouse of the cell
Answer:
Loss of biodiversity.
Explanation:
The resources that are made available to the people must be used in such a way that it is available to everybody in the present time and a bit of it must also be saved for the future.
The resources such as medicines, wood logs and other resources that is obtained from the wildlife resources will be lost if not used in a sustainable way.
